@charset "UTF-8";
body, p, ul, ol, li, dl, dt, dd, h1, h2, h3, h4, h5, h6, form, fieldset, legend, input, select, textarea, button, th, td, menu {
  margin: 0;
  padding: 0; }

* {
  -webkit-box-sizing: border-box;
          box-sizing: border-box; }

ul, dl, ol {
  list-style: none; }

/* img,fieldset,input[type="submit"]{border:0 none;} */
img, input[type="submit"] {
  border: 0 none; }

em {
  font-style: normal; }

strong {
  font-weight: normal; }

table {
  border-collapse: collapse;
  border-spacing: 0; }

button, input[type="button"] {
  cursor: pointer;
  border: 0 none; }

a, button, input, img {
  -webkit-touch-callout: none; }

input {
  outline: none; }

img {
  /*pointer-events:none;*/
  /*禁止图片的点击事件，例如长按保存图片*/ }

/* input,select,textarea{outline:none;} */
a {
  text-decoration: none; }

.fl {
  float: left; }

.fr {
  float: right; }

.clear {
  clear: both; }

.clearFix::after {
  content: "";
  display: block;
  clear: both;
  height: 0;
  visibility: hidden; }

.imgWrap img {
  width: 100%; }

html, body {
  /*禁止用户选择元素*/
  /*-moz-user-select:none;
 -webkit-user-select: none;
-ms-user-select: none;
 -khtml-user-select:none; */
  /*禁止元素点击出现半透明黑色背景*/
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0); }

html {
  height: 100%;
  width: 100%;
  font-family:   "Helvetica Neue",  Helvetica,  Arial,   "PingFang SC",   "Hiragino Sans GB",   "Heiti SC",   "Microsoft YaHei",   "WenQuanYi Micro Hei",  sans-serif;
  outline: 0;
  -webkit-text-size-adjust: none; }

body {
  height: 100%;
  margin: 0;
  position: relative; }

#preload_Page, #start_page {
  width: 100vw;
  height: 100vh;
  position: fixed;
  top: 0;
  left: 0;
  -webkit-transition: all 1s;
  transition: all 1s; }

#preload_Page {
  background-image: url("../images/pre/pre_star.png"), url("../images/pre/pre_bg.jpg");
  background-size: 79.33333vw, cover;
  background-repeat: no-repeat;
  background-position: 100% 100% ,center;
  z-index: 4; }
  #preload_Page #preText {
    font-size: 50px;
    color: white; }

#start_page {
  z-index: 3;
  background-color: tomato; }
  #start_page #start_btn {
    width: 50.66667vw;
    height: 17.06667vw;
    background-color: skyblue;
    line-height: 17.06667vw;
    text-align: center;
    position: fixed;
    bottom: 4.4vw;
    left: 24.66667vw;
    font-size: 30px;
    -webkit-animation-iteration-count: infinite;
            animation-iteration-count: infinite; }

#main_page #opt_group {
  widows: 150px; }
  #main_page #opt_group li {
    height: 80px;
    margin-bottom: 15px;
    background-color: skyblue; }
